AnatD Anatomical Mnemonics and Questions

28/07/2025

Injury to this particular area may cause -----?

28/07/2025

28/07/2025

The snapping hip syndrome

15/06/2025

HISTOLOGY PART 1

FIELD: MICROSCOPIC ANATOMY
TOPIC: STAINS AND CELLS IN HISTOLOGY
BY ANATOMIST VITALIS

Histology, also known as microscopic anatomy, is a vital branch of anatomy that focuses on the detailed study of tissues and cells under the microscope. However, the natural transparency and colorlessness of biological tissues make it nearly impossible to view them clearly without the aid of stains. Stains are special chemical substances that bind to specific cellular or tissue components, giving them contrast and color, thereby making their structures visible and distinct.

The principle behind most histological staining techniques relies on the chemical or physical affinity between the dye and the target tissue structure. For example, acidic dyes (like eosin) bind to basic tissue components such as the cytoplasm and collagen, while basic dyes (like hematoxylin) stain acidic structures like nucleic acids found in the cell nucleus. Through these interactions, different components of the cell can be identified and studied more clearly.

The most commonly used routine stain in histology is the Hematoxylin and Eosin (H&E) stain. Hematoxylin stains the nucleus of cells a deep blue or purple color due to its attraction to DNA and RNA, while eosin stains the cytoplasm, muscle fibers, and connective tissues in various shades of pink and red. H&E staining is the gold standard in histological and pathological examinations due to its simplicity, clarity, and versatility.

Beyond H&E, there are numerous special stains used in histology to visualize specific tissue elements. For instance, Masson's Trichrome stain is used to distinguish collagen (blue or green) from muscle fibers (red) and nuclei (black). The Periodic Acid-Schiff (PAS) stain highlights carbohydrates and mucopolysaccharides in magenta, making it invaluable in diagnosing certain kidney and liver diseases. Silver stains are used to visualize reticular fibers and nerve elements, while Toluidine blue is ideal for i

22/10/2024

We gave them a mnemonic called SITS

08/10/2024

You can now get slides of all anatomy and physiology systems from our very best page.
Leave comments whenever you are ready.

08/10/2024

Teneo Medicus

24/09/2023

An individual of about 50 years characterized by the following :
-fixed muscle tone(expressionless facial features)
-Rigidity of voluntary muscles
-pill rolling movement of the fingers....is said to be having
(a) Alzheimer's disease
(b) Parkinson disease
(c) Huntington disease
(d) Creutzfeldt-jakob disease

24/09/2023

Gradual degeneration of dopamine releasing neurones in the extra pyramidal system will lead to one of the following conditions
(a) Alzheimer's disease
(b) Parkinson disease
(c) Huntington disease
(d) Creutzfeldt-jakob disease

10/09/2023

Hemisection of the spinal cord will lead to one of the following clinical conditions
(a) Syringomyelia
(b) Cauda equina syndrome
(c) Brown-Sequards syndrome
(d) Conus medullaris syndrome

10/09/2023

All the following are parts of Basal ganglia except
(a) Putamen
(b)Globus pallidus
(c) Thalamus
(d) Caudate

10/09/2023

Broca's area is located at
(a) Frontal lobe
(b) Temporal lobes
(c) Occipital lobe
(d) Parietal lobes